Another cool thing 'bout him is that you could cast him, and given that you have at least 4 other goblins in the table, use its ability right away before sorcery-speed removal comes in. Or even play the trick in response to removal!

@Boakes: you've actually already got what's necessary to kill your opponent on T3: just tap the five goblins to have skirky deal 10 damage and the mogg deal 10 damage. Throwing in the furnace of rath actually kills you (in addition to all (non-lifegain) opponents) in your equation, since you wouldn't have more than 20 life.

EDIT:@Concerned_Bystander: The ruling on the main page should set you straight on that:'10/4/2004 Since the ability does not have the {Tap} symbol, you can use the ability before this creature begins a turn under your control.'@Mike-C: You actually only need 3x Kuldotha Rebirth in your example, so it's an 8CMC win.